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How to run LinPack stress test(LinX/IBT)properly-an explanation(maybe a guide) - Page 8

post #71 of 128
I see...well, I thought that 4.2Ghz setup was going to be your day-to-day machine, as is(will be more likely) in my case.

I intend to run with 4.2Ghz, 24/7 for at least the following 5 years, that's why I'm so keen into being as precise as possible.

Anyways...by delta I mean the maximum temperature difference between two Cores, for example in your screenshot is the following data :

74, 72, 70, 69 => delta is 74-69=6 (full load)

33, 28, 32, 28 => delta is 33-28=5 (idle)

I have exactly the same kind of differences/deltas (after 5 days) so my question was if that has increased/decreased over time, in your case (a few months) ?

If I were to find that out that delta becomes 10 degrees then I'd have to change the thermal paste now, not then.

What's your daily use configuration ?
post #72 of 128
I got you and yes, it is my day to day machine (I'm on it now). But I run the OC tests with them 2 settings disabled as I followed the guide linked in my earlier post. It's the first OC I've ever done, so I followed that guide word for word and was pretty fussy with changing voltages and running tests.

I'm not sure what the temps are at full load with my current set up as I haven't run them since re-enabling them 2 settings and therefore, starting to use the machine properly.

If I get some spare time, I'll re-run the linx tests and let you know what happens.
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post #73 of 128
Yeah, disabling those two settings does improve stability.

Until then would you mind telling me your idle temps & ambient ?
post #74 of 128
41/36/40/35 at the moment, idling. I have Firefox with 6 tabs (one with a bbc video playing), Windows Live Mail, Windows Live Messenger and Realtemp running.

So it's about 8 degrees higher than previously, and the ambient I don't know because I don't have a thermometer, but it's about as warm as this room gets. Maybe add another 2d for arguments sake, making it 10.
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post #75 of 128
Very nice temperatures indeed but without room ambient I can't quite make the math
Are the windows opened ? www.wunderground.com can tell you the exact outside temperature.

CPU voltage would really help, both BIOS and CPUz reports, please.

If your ambient temps are equal to mine then I might have applied the TIM in a wrong manner and therefore I'd need to redo it.
Edited by Kargeras - 5/10/10 at 11:04am
post #76 of 128
I'll try and get the ambient, once I do I'll take a screen of cpuz and realtemp.
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post #77 of 128
Definitely looking forward to it

Thank you!
post #78 of 128
Okay, I followed the steps and can't seem to get good reference (or actual) GFlops

I'm using a i7 930---2.8ghz stock

Set volts and BCLK to stock, freed up about 5560MB of ram (of 6gb, and only 25mb cached).

Only getting ~32Gflops here, vs 2.8*16=44.8 expected.

Closed most services, all background programs. Could not close my antivirus krn (kernel?) through servies:access denied.

I am running win 7 64bit, if that makes a difference.

at 4.0ghz OC i can get about 53 gflops---nothing compared to jimmy's 61!!

what am i missing? safe mode...?

EDIT: In safe mode, stock gflops are 36.6. Still don't feel like that's satisfactory...
Edited by krescent - 5/12/10 at 3:29pm
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post #79 of 128
With my i7 4Ghz and with HT ON - I was getting 51gflops vs my calculate 64 so about 80%.
But with HT turned OFF - I now get about 58gflops ie. about 90%.

So my question is am I meant to turn off HT? Will I not get the calculated gflops with HT turned on? Note, turbo and all energy saving settings are OFF.

And finally, my gflops are not 'identical' each run, slight fluctuations. Is that normal or does that mean I continue to have issues?

Oh - with HT off, I'm seeing a drop of 8-10'C in temps. I'm only using my 4.2Ghz with HT off. Otherwise it's too hot for me.
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post #80 of 128
Quote:
Originally Posted by Kargeras View Post
Anyways...by delta I mean the maximum temperature difference between two Cores, for example in your screenshot is the following data :

74, 72, 70, 69 => delta is 74-69=6 (full load)

33, 28, 32, 28 => delta is 33-28=5 (idle)
Your load temps and delta are pretty much what I'm seeing.
Your idle are however far lower than mine. I'm at ~40'C for idle.
My ambient is about 20-22'C
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